Year	kg per kg of oil equivalent energy use
2005	1.8741538335303838
2006	1.852347510589395
2007	1.7685789215711045
2008	2.1083619673446865
2009	1.7192174122339512
2010	2.194151819997908
2011	2.256229502954417
2012	2.193265263667196
2013	2.3121575689547518
2014	2.320942428082149